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Old 6th January 2019, 20:48   #7  |  Link
FLX90
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Join Date: Nov 2018
Posts: 34
Quote:
Originally Posted by Sharc View Post
Well, whenever a lossy source (your VC-1) is getting re-encoded with a lossy encoder such as x264 it will introduce more/new losses and artefacts, unless you set the bitrate very very high or encode "lossless" (--crf 0) producing huge file sizes. The extra losses may however be barely visible when re-encoding with a sufficiently high bitrate or a --crf of say 12 or even less.
So re-encoding with the same bitrate as the "original" source does not mean that the quality remains the same (untouched).
Quote:
Originally Posted by sneaker_ger View Post
Lossy AVC re-encode will always lose information from original. Whether you encode with 16997, 16999 or 10000000 kbps. But 10000000 will lose less information than 16997.
Ah, okay. That makes it clear.
I tried --crf 0 and the filesize would be many terabytes. So that's unusable.


Quote:
Originally Posted by sneaker_ger View Post
At ~17 Mbps a human will usually not notice any difference to the original Blu-Ray, though, so that's ok. That's your goal, right?
My goal is to preserved most information I can (but with usable filesize).
But as I take it the one exlcudes the other.

Would more passes bring me closer to the original without dramatically increasing the filesize?


Code:
  -p, --pass <integer>        Enable multipass ratecontrol
                                  - 1: First pass, creates stats file
                                  - 2: Last pass, does not overwrite stats file
                                  - 3: Nth pass, overwrites stats file
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